The "Roof of the World" is Leaking If China's recent history of environmental stewardship is any guide, the future of Tibet is as hazy as Beijing's sky. China's push to develop Tibet may irreparably damage it.

Chemists Take Unique River Jaunt An international team assembled to test environmental pollution and water quality in the River Danube will be sleeping in bunks aboard the Hungarian ice breaker Szecheny.

Energy Regulators Adjust to a Tidal Gold Rush The number of real opportunities for tidal energy -- where incoming and outgoing tides drive underwater turbines -- is small. But the Federal Energy Regulatory Commission is trying to clear the path and bring tidal energy into the 21st century.

Restoring the River Since Katrina struck, one thing has become clear, researchers say: Restoration of the natural system is of paramount importance to saving New Orleans in the long run, and the time to act is now.